Skype - Internet Telephony - Released for Windows, MacOS X, and Linux

Skype, an application for making free calls over the internet (though making calls to real phones is not free), has finally been released for non-Windows computers. Finally, there is a single application for making calls between any two computers on the Net, which integrates cleanly with landline and cell phones. I have not actually used this app, and am not really ready to do so myself. But now that it is available for MacOS X, I will be keeping an eye on things. Once the first bugs are ironed out, I will jump in with at least one foot.